ethtool -i <network card> <network card> can be eth0 etc.
Example output:
driver: e1000\\ version: 7.3.21-k4.1-NAPI\\ firmware-version: N/A\\ bus-info: 0000:02:00.0
The bus-info can be coupled with lspci
lspci -s -v "2:"
Where 2: is taken from ethtool bus-info.
02:00.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) (rev 01)
Subsystem: VMware PRO/1000 MT Single Port Adapter
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 59
Memory at d8920000 (64-bit, non-prefetchable) [size=128K]
Memory at d8900000 (64-bit, non-prefetchable) [size=64K]
I/O ports at 2000 [size=64]
[virtual] Expansion ROM at dc400000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Capabilities: [e4] PCI-X non-bridge device